Aprojectile is fired vertically from earth's surface with
aninitial speed of 10 km/s. neglecting air drag, how far abovethe
surface of earth will it go?

Explanation:

Initial speed, v = 10 x 10^3 m/s

Mass of the earth, M = 6 x 10^24 kg

Radius of the earth, R = 6.4 x 10^6 m

Maximum from the surface of earth, h = ?

Let  m = Mass of the projectile

Solution:

Potential energy at maximum height =  ( Potential + Kinetic energy ) at the surface

=

=

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